mersick



(No Model.)

B. P. MERSIGK.

SPEAKING TUBE.

No. 434,672. Patented Aug. 19', 1890.

UNITED STATES PATENT OFFICE.

EDWVIN F. MERSICK, OF NEWV HAVEN, CONNECTICUT, ASSIGNOR TO ENGLISH 85MERSICK.

SPEAKING-TUBE.

SPECIFICATION forming part of Letters Patent No. 434,672, dated. August19, 1890. Application filed May 19, 1890. Serial No. 352,387. (Nomodel.)

To all whom it may concern: as a screw-thread to draw the tube into theBe it known that I, EDWIN F. MERSICK, of socket. That the fabriccovering may be in- New Haven, in the county of New Haven and closed andprotected at that end, the socket State of Connecticut, have inventedanew Imis constructed at that end with a recess soprovementinSpeaking-Tubes; andldohereby much larger than the wire partof the tube as declare the following, when taken in connecto extend overthe covering, as seen in Fig.

' tion with accompanying drawings and the let- 2. This forms a recess ain the end of the ters of reference marked thereon, to be a full,socket, which incloses the covering of the tube, clear, and exactdescription of the same, and so as to protect and give a finish to thecovto which said drawings constitute part of this ering at its junctionwith the mouth-piece, it specification, and represent, inbeingunderstood that the covering is removed Figure 1, a side view of thetube with the on that portion of thetube which enters the mouth-pieceattached; Fig. 2, a longitudinal screw-threaded portion of themouth-piece. section through one of the mouth-pieces and This unionbetween the mouth-piece and x 5 a portion of the tube; Fig. 3, alongitudinal tube makes a firm connection, which is not section of themouth-piece detached, and Fig. liable to be accidentally detached, butyet j 4 the divided spring'ring detached. permits the mouth-piece to bereadily removed This invention relates to an improvement should occasionrequire. in speaking-tubes such as used upon carriages The whistle isplaced inside the mouth- 20 as a communication from the occupants to thepiece. To permanently unite the whistle with coachman, and in which thetube is flexible, the mouth-piece, and so that it may be staapplicablealso to other purposes, the object tionarytherein, the mouth-piece isconstructed of the invention being, first, to construct the with anannular shoulder b on its inside dismouth-piece with the whistlestationary theretant from the outer end of the mouth-piece 25 in,andalso to unite the flexible tube withthe so far as to be out of the wayof the lips.

mouth-piece in a simple and durable manner; Against this shoulder theWhistle D is set,

and the invention consists in the constructhe whistle being a commonmouth-piece tion as hereinafter described, and particularly whistle, andaround theinterior of the mouthrecited in the claims. piece outside thewhistle an annular groove A represents the mouth-piece which is ind isformed, into which a divided wire ring 6 8o tended for use at thecoachmans end of the is placed. This wire ring is represented intube,and-B the mouth-piecewhich is intended Fig. 5 detached. It is madefrom wire of a for the inside end of the tube, C being the diametersomewhat greater than the diamefiexible tube connecting the twomouth-pieces. ter in the groove d, and a portion of the ring 3 5 Theflexible tube is constructed from wire is cut away, as at f. The ring iselastic, spirally wound and covered with fabric. In so that it may bepressed into the mouth- Fig. 2 this tube is shown in longitudinalsecpiece, contracting until it reaches the groove' tion. Themouth-pieces are made from wood, d, when it will expand into the grooveand hard rubber, or other suitable material, and there lie against thewhistle, so as to secure 40 are constructed with a socket C at the tubethe whistle between the shoulder d and the end. This socket is of aninternal diameter said divided ring, thus firmly holding thecorresponding to the external diameter of the mouth-piece in place.spiral-wire portion of the tube, and is inter- The opening through thewhistle is suffinally grooved with a spiral groove correspondcient forspeaking purposes without disturb- 45 ing to the spiral wire of thetube, and so as to ing the position of the whistle, and the call 5 formpractically an internal screw-thread in is made from the othermouth-piece by blow: the socket, as seen in Fig. 3, which come ing, asusualin speaking-tubes Where whistles sponds to the spiral surface ofthe tube, and are employed as the signal. so that the tube may bescrewed into the Both mouth-pieces maybe provided witha 5o socket, theconvolutions of the wire operating whistle, if desired; but incase of acarriage- I00 tube the one at the coachmans end is all that 2. In aspeaking-tube, the mouth-piece conis necessary. structed with aninternal shoulder Z) and with I 5 1 claim an annular groove cl outsidesaid shoulder, a 1. In a speaking-tube in which the tube is whistle D,set against said shoulder, and the 5 made from a spiral-wire body, thecombinadivided spring-ring e in said groove d, subtion therewith of amouth-piece constructed stantially as described, and whereby the saidwith a socket at the tube end, the socket inwhistle is secured in themouth-piece between 20 ternally screw-threaded corresponding to the thesaid shoulder and the said ring. convolutions of the wire body, the endof the 10 wire body screwed into the said socket, the EDWIN F. MERSIOK.

convolutions of the wire forming the screw- Witnesses: thread for theunion of the mouth-piece and FRED C. EARLE, tube, substantially asdescribed. J. H. SHUMWAY.

